thanks for the tip, we actually have a lot of plugins installed, it might even be that we use only 50% of them.

I will get a new version of the plugin next week (protools plugin) and hope this will solve it.If not I could check which other plugins are not needed, and take them out, as you say there might be conflicting plugins.

What we found out so far is that the automatic download of chilkat_win64.dll to users\user-name\.servoy is not working sometimes, and that DLL is important in our case.

What I did read somewhere was that deletion of Java Cache and the .servoy folder in the users folder might help, however it seems not in our case.